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Answer the questions on the
basis of your understanding of the following passage and related studied concepts:
Sodium is a very important element Many of its compound are widely used by us, even in our food as well as for washing clothes. Sodium carbonate decahydrate (Na_2CO_3· 10 H_2O) is called washing soda and is widely used for washing clothes. When it is saturate with dioxide of carbon in moist environemnt, it given a product called baking soda.

Na_2CO_3+H_2O+CO_2Δ⟶NaH_3CO_3

Baking soda is used in small amount in making bread and cake. It helps to make these soft and spongy. An aqueous solution of baking soda turns red litmus blue. It is also used in soda-acid fire extinguisher.
Baking powder helps in making cakes and bread soft and spongy by
(a) providing hydrogen gas
(b) releasing carbon monoxide gas
(c) releasing carbon dioxide gas
(d) reacting dough of cakes and bread

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